Neodymium magnets – strongest on the market

Looking for huge power in small size? We offer rich assortment of disc, cylindrical and ring magnets. Perfect for for domestic applications, workshop and industrial tasks. See products in stock.

check price list and dimensions

Magnet fishing: strong F200/F400 sets

Start your adventure with treasure salvaging! Our double-handle grips (F200, F400) provide grip certainty and huge lifting capacity. Solid, corrosion-resistant housing and reinforced ropes will perform in rivers and lakes.

find searching equipment

Professional threaded grips

Proven solutions for mounting non-invasive. Threaded grips (external or internal) provide quick improvement of work on warehouses. They are indispensable installing lamps, detectors and banners.

see industrial applications

📦 Fast shipping: buy by 14:00, we'll ship today!

Dhit sp. z o.o.
Product on order Ships in 3-5 days

MPL 25x10x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020387

GTIN/EAN: 5906301811862

5.00

length

25 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

5.63 g

Magnetization Direction

↑ axial

Load capacity

4.14 kg / 40.56 N

Magnetic Induction

230.69 mT / 2307 Gs

Coating

[NiCuNi] Nickel

3.57 with VAT / pcs + price for transport

2.90 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
2.90 ZŁ
3.57 ZŁ
price from 250 pcs
2.73 ZŁ
3.35 ZŁ
price from 900 pcs
2.55 ZŁ
3.14 ZŁ
Want to talk magnets?

Contact us by phone +48 888 99 98 98 if you prefer drop us a message by means of form the contact form page.
Specifications along with shape of a magnet can be tested with our force calculator.

Orders placed before 14:00 will be shipped the same business day.

Physical properties - MPL 25x10x3 / N38 - lamellar magnet

Specification / characteristics - MPL 25x10x3 / N38 - lamellar magnet

properties
properties values
Cat. no. 020387
GTIN/EAN 5906301811862
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
length 25 mm [±0,1 mm]
Width 10 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 5.63 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.14 kg / 40.56 N
Magnetic Induction ~ ? 230.69 mT / 2307 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 25x10x3 / N38 - lamellar magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Engineering simulation of the product - data

These values represent the outcome of a engineering simulation. Results were calculated on models for the material Nd2Fe14B. Actual parameters might slightly differ. Use these data as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - power drop
MPL 25x10x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2306 Gs
230.6 mT
4.14 kg / 9.13 lbs
4140.0 g / 40.6 N
medium risk
1 mm 2050 Gs
205.0 mT
3.27 kg / 7.21 lbs
3272.4 g / 32.1 N
medium risk
2 mm 1752 Gs
175.2 mT
2.39 kg / 5.27 lbs
2388.9 g / 23.4 N
medium risk
3 mm 1463 Gs
146.3 mT
1.67 kg / 3.68 lbs
1667.1 g / 16.4 N
weak grip
5 mm 1000 Gs
100.0 mT
0.78 kg / 1.72 lbs
779.2 g / 7.6 N
weak grip
10 mm 416 Gs
41.6 mT
0.13 kg / 0.30 lbs
134.4 g / 1.3 N
weak grip
15 mm 200 Gs
20.0 mT
0.03 kg / 0.07 lbs
31.0 g / 0.3 N
weak grip
20 mm 108 Gs
10.8 mT
0.01 kg / 0.02 lbs
9.0 g / 0.1 N
weak grip
30 mm 40 Gs
4.0 mT
0.00 kg / 0.00 lbs
1.3 g / 0.0 N
weak grip
50 mm 10 Gs
1.0 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip

Table 2: Sliding force (wall)
MPL 25x10x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.83 kg / 1.83 lbs
828.0 g / 8.1 N
1 mm Stal (~0.2) 0.65 kg / 1.44 lbs
654.0 g / 6.4 N
2 mm Stal (~0.2) 0.48 kg / 1.05 lbs
478.0 g / 4.7 N
3 mm Stal (~0.2) 0.33 kg / 0.74 lbs
334.0 g / 3.3 N
5 mm Stal (~0.2) 0.16 kg / 0.34 lbs
156.0 g / 1.5 N
10 mm Stal (~0.2) 0.03 kg / 0.06 lbs
26.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - vertical pull
MPL 25x10x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.24 kg / 2.74 lbs
1242.0 g / 12.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.83 kg / 1.83 lbs
828.0 g / 8.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.41 kg / 0.91 lbs
414.0 g / 4.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.07 kg / 4.56 lbs
2070.0 g / 20.3 N

Table 4: Material efficiency (saturation) - power losses
MPL 25x10x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.41 kg / 0.91 lbs
414.0 g / 4.1 N
1 mm
25%
1.04 kg / 2.28 lbs
1035.0 g / 10.2 N
2 mm
50%
2.07 kg / 4.56 lbs
2070.0 g / 20.3 N
3 mm
75%
3.10 kg / 6.85 lbs
3105.0 g / 30.5 N
5 mm
100%
4.14 kg / 9.13 lbs
4140.0 g / 40.6 N
10 mm
100%
4.14 kg / 9.13 lbs
4140.0 g / 40.6 N
11 mm
100%
4.14 kg / 9.13 lbs
4140.0 g / 40.6 N
12 mm
100%
4.14 kg / 9.13 lbs
4140.0 g / 40.6 N

Table 5: Thermal stability (stability) - power drop
MPL 25x10x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.14 kg / 9.13 lbs
4140.0 g / 40.6 N
OK
40 °C -2.2% 4.05 kg / 8.93 lbs
4048.9 g / 39.7 N
OK
60 °C -4.4% 3.96 kg / 8.73 lbs
3957.8 g / 38.8 N
80 °C -6.6% 3.87 kg / 8.52 lbs
3866.8 g / 37.9 N
100 °C -28.8% 2.95 kg / 6.50 lbs
2947.7 g / 28.9 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 25x10x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 8.20 kg / 18.07 lbs
3 767 Gs
1.23 kg / 2.71 lbs
1230 g / 12.1 N
N/A
1 mm 7.38 kg / 16.27 lbs
4 377 Gs
1.11 kg / 2.44 lbs
1107 g / 10.9 N
6.64 kg / 14.65 lbs
~0 Gs
2 mm 6.48 kg / 14.28 lbs
4 101 Gs
0.97 kg / 2.14 lbs
972 g / 9.5 N
5.83 kg / 12.86 lbs
~0 Gs
3 mm 5.58 kg / 12.30 lbs
3 805 Gs
0.84 kg / 1.84 lbs
837 g / 8.2 N
5.02 kg / 11.07 lbs
~0 Gs
5 mm 3.97 kg / 8.74 lbs
3 208 Gs
0.59 kg / 1.31 lbs
595 g / 5.8 N
3.57 kg / 7.87 lbs
~0 Gs
10 mm 1.54 kg / 3.40 lbs
2 001 Gs
0.23 kg / 0.51 lbs
231 g / 2.3 N
1.39 kg / 3.06 lbs
~0 Gs
20 mm 0.27 kg / 0.59 lbs
831 Gs
0.04 kg / 0.09 lbs
40 g / 0.4 N
0.24 kg / 0.53 lbs
~0 Gs
50 mm 0.01 kg / 0.01 lbs
127 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.01 lbs
80 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
54 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
38 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
27 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
20 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MPL 25x10x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (kinetic energy) - warning
MPL 25x10x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 27.90 km/h
(7.75 m/s)
0.17 J
30 mm 47.38 km/h
(13.16 m/s)
0.49 J
50 mm 61.15 km/h
(16.99 m/s)
0.81 J
100 mm 86.48 km/h
(24.02 m/s)
1.62 J

Table 9: Coating parameters (durability)
MPL 25x10x3 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)

Table 10: Construction data (Pc)
MPL 25x10x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 928 Mx 59.3 µWb
Pc Coefficient 0.25 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 25x10x3 / N38

Environment Effective steel pull Effect
Air (land) 4.14 kg Standard
Water (riverbed) 4.74 kg
(+0.60 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Warning: On a vertical surface, the magnet holds only ~20% of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Heat tolerance

*For standard magnets, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.25

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical specification and ecology
Elemental analysis
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Environmental data
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 020387-2026
Measurement Calculator
Force (pull)

Magnetic Induction

View more offers

This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 25x10x3 mm and a weight of 5.63 g, guarantees premium class connection. This magnetic block with a force of 40.56 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 25x10x3 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of generators and material handling systems. Thanks to the flat surface and high force (approx. 4.14 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 25x10x3 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 25x10x3 / N38 model is magnetized through the thickness (dimension 3 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (25x10 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 25 mm (length), 10 mm (width), and 3 mm (thickness). It is a magnetic block with dimensions 25x10x3 mm and a self-weight of 5.63 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even after nearly 10 years – the decrease in power is only ~1% (based on measurements),
  • They possess excellent resistance to magnetism drop as a result of opposing magnetic fields,
  • In other words, due to the smooth surface of silver, the element becomes visually attractive,
  • The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of exact shaping and adjusting to individual conditions,
  • Huge importance in innovative solutions – they serve a role in magnetic memories, brushless drives, precision medical tools, as well as industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating nuts in the magnet and complex shapes - preferred is a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these products are able to complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Detachment force of the magnet in optimal conditionswhat affects it?

The force parameter is a measurement result conducted under specific, ideal conditions:
  • with the use of a sheet made of special test steel, guaranteeing full magnetic saturation
  • possessing a thickness of at least 10 mm to avoid saturation
  • with a surface free of scratches
  • with total lack of distance (without coatings)
  • under vertical force direction (90-degree angle)
  • at room temperature

What influences lifting capacity in practice

Please note that the working load will differ depending on the following factors, in order of importance:
  • Gap (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Material type – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
  • Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Life threat

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Maximum temperature

Control the heat. Heating the magnet to high heat will ruin its magnetic structure and strength.

Impact on smartphones

Remember: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your mobile, device, and GPS.

Metal Allergy

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness appears, cease working with magnets and use protective gear.

Physical harm

Mind your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Magnetic media

Powerful magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Fire warning

Powder produced during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Keep away from children

Only for adults. Small elements can be swallowed, leading to severe trauma. Store away from children and animals.

Safe operation

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Shattering risk

Protect your eyes. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Attention! Need more info? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98